A man goes into a pet shop to buy a parrot. The shop owner points to three identical-looking parrots on a perch and says, "The parrot on the left costs $500."
"Why does it cost so much?" asks the customer.
"Well," the owner explains, "that parrot knows how to do legal research."
The customer asks about the next parrot and is informed that it costs $1,000 because it can do everything the first parrot can do plus it knows how to write a brief that will win any case.
Naturally, the increasingly startled customer asks about the third parrot.
"$4,000," says the shop owner proudly.
"Wow!" the customer exclaims. "What can he do?!"
"To be honest," the shop owner admits, "I've never seen him do a darn thing, but the other two call him Senior Partner."